Android Open Source - AstroPhysCalc Dimension Test

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Back to project page AstroPhysCalc.

License

The source code is released under:

Apache License

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Java Source Code

package org.astrophyscalc;
/*from   w  w  w .jav  a 2 s.  c  om*/
import junit.framework.Assert;

import org.junit.Test;

public class DimensionTest extends Assert {

  @Test
  public void testCreate() {
    int numerator = 4;
    int denominator = 7;

    Dimension dim = Dimension.create(numerator, denominator);

    assertEquals(numerator, dim.getNumerator());
    assertEquals(denominator, dim.getDenominator());

    String exceptionMsg = "";
    try {
      Dimension dim2 = Dimension.create(3, 0);
    }
    catch (IllegalArgumentException ex) {
      exceptionMsg = ex.getMessage();
    }

    assertEquals(Dimension.DENOMINATOR_ZERO, exceptionMsg);
  }

  @Test
  public void testEquals() {
    int num1 = 4;
    int den1 = 9;

    int num2 = 3;
    int den2 = 7;

    Dimension dim1;
    Dimension dim2;

    // dim, null
    dim1 = Dimension.create(num1, den1);
    dim2 = null;
    assertEquals(false, dim1.equals(dim2));

    //dim, object
    Object object = new Object();
    assertEquals(false, dim1.equals(object));

    //dim, dim (but reference is of type Object)
    object = Dimension.create(num1, den1);
    assertEquals(true, dim1.equals(object));

    // equal, equal
    dim1 = Dimension.create(num1, den1);
    dim2 = Dimension.create(num1, den1);
    assertEquals(true, dim1.equals(dim2));

    // equal, not equal
    dim1 = Dimension.create(num1, den1);
    dim2 = Dimension.create(num1, den2);
    assertEquals(false, dim1.equals(dim2));

    // not equal, equal
    dim1 = Dimension.create(num1, den1);
    dim2 = Dimension.create(num2, den1);
    assertEquals(false, dim1.equals(dim2));

    // not equal, not equal
    dim1 = Dimension.create(num1, den1);
    dim2 = Dimension.create(num2, den2);
    assertEquals(false, dim1.equals(dim2));
  }

  @Test
  public void testIsOne() {
    int numerator = 1;
    int denominator = 1;

    Dimension dim = Dimension.create(numerator, denominator);

    assertEquals(true, dim.isOne());
  }

  @Test
  public void testIsZero() {
    int numerator = 0;
    int denominator = -12;

    Dimension dim = Dimension.create(numerator, denominator);

    assertEquals(true, dim.isZero());
  }

  @Test
  public void testNegative() {
    int numerator = -5;
    int denominator = 1;

    Dimension dim = Dimension.create(numerator, denominator);

    assertEquals(true, dim.negative().equals(Dimension.create(-numerator, denominator)));
  }

  @Test
  public void testToDouble() {
    int numerator = 3;
    int denominator = -12;

    Dimension dim = Dimension.create(numerator, denominator);

    assertEquals(-1d/4d, dim.toDouble(), 1E-9d);
  }

  @Test
  public void testPow() {
    int numerator = 2;
    int denominator = 6;

    Dimension dim = Dimension.create(numerator, denominator);

    assertEquals(Dimension.create(6, 24), dim.pow(Dimension.create(3, 4)));
  }

  @Test
  public void testAdd() {
    Dimension dim1 = Dimension.create(1, 3);
    Dimension dim2 = Dimension.create(2, 4);

    assertEquals(Dimension.create(10, 12), dim1.add(dim2));
  }

  @Test
  public void testSubtract() {
    Dimension dim1 = Dimension.create(1, 3);
    Dimension dim2 = Dimension.create(3, 9);

    assertEquals(Dimension.ZERO, dim1.subtract(dim2));
  }

}

Java Source Code List